https://jira.hyperledger.org/browse/FAB-2027

Per https://jira.hyperledger.org/browse/FAB-2026

 the proto style in
fabric is inconsistent and violates accepted proto style guidelines.

This CR makes the non-golang code invasive proto changes to conform with
the style guide.

In particular, protoc converts lower_underscore_separated to
LowerUnderscoreSeparated which means that most of our existing fields
can be normalized to the official proto style with no code changes.

This does not fix fields which contained upper case abbreviations
particularly fields ending in 'ID' like txID which must become tx_id and
will be translated to TxId.

This does not fix the enum fields which by proto style should be
UPPER_CASE as this will also require code changes.

Change-Id: Id32d6caba43be9e1c6b1f638be284071bf52f0fd
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>